Audio adapter



FIG. 1 is a perspective view of an audio adapter as seen from the front and top;

FIG. 2 is a top view thereof;

FIG. 3 is a side view thereof, the opposite side view is a mirror image of the side view;

FIG. 4 is a bottom view thereof;

FIG. 5 is a front view thereof; and,

FIG. 6 is a back view thereof.

The dotted line portions of the drawings represent environmental structure only and form no part of the claimed design. The broken line showing of numbers, words, and symbols forms no part of the claimed design. 

CLAIM The ornamental design for an audio adapter, substantially as shown and described. 